Alert archive / Utah / Special Weather Statements in 2021
Special Weather Statement, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this special weather statement at Jan 5, 2021, 12:08 AM MST for 6 counties in Utah. It was in force for 82 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jan 5, 2021, 12:08 AM MST (07:08 UTC)
- Expired
- Jan 5, 2021, 1:30 AM MST
- In force
- 82 min
- Issued by
- NWS Salt Lake City, UT
Counties Box Elder County, UT, Cache County, UT, Davis County, UT, Salt Lake County, UT, Tooele County, UT, Weber County, UT
The radar
The Salt Lake City radar (KMTX), 5 km from the middle of the area, began a volume at 07:13 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Salt Lake City I, UT (KSLC), launched 00:00Z, 7.1 hours before the alert went out and 67 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1834 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 171 m²/s²
- 0-3 km storm-relative helicity
- 274 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
981 WWUS85 KSLC 050708 SPSSLC Special Weather Statement National Weather Service Salt Lake City UT 1208 AM MST Tue Jan 5 2021 UTZ001>008-050830- Wasatch Mountains South of I-80 UT-Wasatch Mountain Valleys UT- Cache Valley/Utah Portion UT-Wasatch Mountains I-80 North UT- Great Salt Lake Desert and Mountains UT-Southern Wasatch Front UT- Northern Wasatch Front UT-Salt Lake and Tooele Valleys UT- 1208 AM MST Tue Jan 5 2021 ...SIGNIFICANT WEATHER ADVISORY FOR WEBER...WESTERN CACHE...CENTRAL BOX ELDER...SALT LAKE...DAVIS...WEST CENTRAL MORGAN...NORTHWESTERN UTAH AND CENTRAL TOOELE COUNTIES UNTIL 130 AM MST... At 1201 AM MST, National Weather Service Doppler radar indicated a band of heavy snow along a fast moving cold front, extending from Park Valley to Knolls to Fish Springs Wildlife refuge. This band is moving east at 40 mph, and will across the Wasatch Front around 1 AM. A burst of heavy snow along with winds to near 40 mph will be possible as this band crosses the area, which may result in rapid snow accumulation across area roadways, particularly mountain routes such as Parleys, Weber, and Logan Canyons. Locations impacted include... Salt Lake City, West Valley City, Sandy, Ogden, Layton, Logan, Murray, Bountiful, Tooele, Farmington, Brigham City, Grantsville, Tremonton, Snowville, Hill Air Force Base, Dugway English Village, Cache, West Jordan, Taylorsville and South Jordan. This includes the following highways... Interstate 15 between mile markers 276 and 398. Interstate 84 between mile markers 4 and 97. Interstate 80 in Utah between mile markers 34 and 130. US Route 89 between mile markers 459 and 463. Utah Route 30 between mile markers 61 and 90. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared for rapid onset of winter driving conditions across all area roadways. && LAT...LON 4198 11174 4021 11177 4010 11352 4197 11320 TIME...MOT...LOC 0701Z 257DEG 35KT 4180 11305 4067 11323 $$ MPS
Nearby
Special Weather Statements in Utah, 2021Every special weather statement in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.